Incinerator with centrally supported superimposed air supply means



3 Shets-Sheet MARTlN ET AL INVENTORS [HA/?LEE H//VN/G 5. MART//VATTORNEY BY WAR/?E N W. INCINERATOR WITH CENTRALLY SUPPORTEDSUPERIMPOSED AIR SUPPLY MEANS July ll, 1950 Filed July 25, 1946 July ll,1950 w. s. MARTIN ET AL INCINERATOR WITH CENTRALLY SUPPORTEDSUPERIMPOSED AIR SUPPLY MEANS 3 Sheets-Sheet 2 Filed July 25, 1946INVENTORS CHARLES HEA/N/G BY WA/FRENSMARTIN f g &Qa a/.11,

ATTORNEY y 1950 w. s. MARTIN ET AL 2,514,657

INCINERATOR WITH CENTRALLY SUPPORTED SUPERIMPOSED AIR SUPPLY MEANS 5SheetS-Sheet 3 Filed July 25, 1946 INVENTORS [HA/?1.53 HENN/G; BY WARREN5. MARTIN ATTORNEY times.

bmast ion E Y- an. upwardl extend e. sata ona y y e ber M a are providedt suep y ai :to th Patenta& Jul y 11, 1950 .ntmmm@ TH QENTRALLY ;s

RT SUPER M Q seem( 'Warren S.` Martin, Massapequa, and; Charles H s, F

Bueerll st u or mn a, corporation of Delawar to M nse Application July25 1946', Serial No. (386316 Qla ma e 0--=1:3.-).

This` invention relates to apparatus; for meineratingrubbish and' otherlike waste; material-` as is capable of being dlsposed of byincineration.

It is not uncommon. to; dispose of trash, garbage, waste paper andthelike which is, astaway 'by populated communities, by .burning this rnb.-

bish in a furnace. There are, of course, va ious types and sizes ofdisposaL plants but a y event. not. infrequently, a furnace is, providedwithin which to burn the rubbish. it; is, well known that the rubbjshfrom a communityvaries in kind at different seasons and at difierentOrdinari-ly, the rubbish must be partial-ly dried or desiccated inorderto make. it bum Well. In the burning operation, the rubbish, garhage andtrash need to be stirred up orstoked.` to allow .air to. get into theple of' rubbish in the furnace note only. to support combusti'on butalso to .drive off* excess moisture ordampness so that: the com bustiblestufiwill burn.

'It S an object of this. inVention-to, provide an incinerator apparatus.and .stoker dla-vice so arranged as` to mechanically .stokea pileofgrubhish 'being burned in a furnace while causing a stream 'of air topass through the rubbish serving, to wholly or 'partially dry it whilecausing another stream of-.air to. pass upwardly *through a supportin&grate ontoxwhioh the partialht dried rub- 'b'sh isautomatically-moved;from the pile and' on --wh i'c;h *the burning iscompleted. The hot gases from the combustion are utflized if deired to'hoat the air ;going-to the turnace and. this results in increasedoverall .eflciency-` of the rubbish, disposaloperations.

'In accordancewith a preferred form of themcinerator apparatus thereisprovided a cylinir-ically shaped fire-box haying acha ing port in itsrooa comb v ion Qham qon. aci h to which mturn i nnetecl by a suitable flueto a himney'.. 'Th fr -bo s p ded W a 'ciramar: arthhav-, n a centraopenin t ac x mqd te. e h te a atehe de ic M d, the

.fire-.box upwardly through the grate and also t ugh e. st g el anisni ht t p sto e mecharism i provide@ w th. tat p a Christmas tree" headserving to har the weight reference characters.

2 into the pile. A normallyclosed ashgpitv in, .the bottom. of thefire-box, beneath the grate, also provides space for mounting a hollow.rotaltabl'e shanit of the stokermechanism and; also a staltionary shaft concentric therewith upon which-is carried; ;the "Christmas tree'tuy'e head Ene rotating shaft of the stoker is operated a sprocket chandriven by a prime mover located outside the firebox Although the novelfeatures which are 'believed tobe oharacteristic of the .inventionWilLbepQ' 't', ed out'in the annexed claims, the inwntion t self as to.its objects and advantages. anethe manner in which it may' be carried:out may be better understood by reference to the ,follow-ing,description taken in connection with .the accom: panyingdrawingsiormirg a art herof, in which:

Eig. :1 is an elevation :View in cross-section ,of an incineratorapparatus embodying the invention and ,showing the general arrangementEig 2 is an elevation View in orossetion through the lower end of thefire-box to la er scale, showing the stoker mechanism. and tuyre head'in .great/er' detail; said View being on `line 2:2 of'Fig.-1; and` VBig. '3 is a plan View on 'line 3-3 o Eig. 2, partly broken away to.better llustratethe con# struction of the armso-the stoker m c nism.-.

Referring .now to the d'awn s, n which ik indicate co r sper ngpartsthere.is shown a-fire-bqx lohaving acyl ndricasurrounding; wall Il, roof 12 and ash-pit 13:. connected by a fiue l 4- isa combustionchamber I5-m-t1 on ec e o a fin g h oh m y be conn ct d to a hi r y (nWe)- 'The' fir-e box mbustion hamb r and flee .at of hr' kwork w th n aheet stee asin Thes .suppor d by l: ammember c ldme #so-. ood in eri g,rac i e 'This-t 'O cenon-action bein enea l& Well kn w th e a Eneeat'qrth fir zb xi p ov de w the 9 tral charging port IT aboge which 'siahopper .1 .8

. 'accessible from the charging n ar level !9, .The

erkim-'inee 'anyearned@ tim j hearth 25.

An annular hearth 25 is suitably supported in the lower part of thefire-box n and the area between the peripheral outside edge of thehearth 25 and the inner surface of the cylindrical wall I I is providedwith an annular grate 26. For convenience in Construction and to'facilitate re'pairs, the hearth may desirably be made in sectorshapedsections 25a and the grate in sectorshaped sections 26a. The gratesections are preferably of dump-grate type. They are mounted on aT-shaped radial supporting member !26 and may be manipulated by a gratebar !21. The ash-pit |3 is in the shape of an inverted truncated coneand terminates in an ash discharge chute 21 which is provided with ahori- Zontally slidable gate 28 (shown conventionally). When this gate28 is closed the ash-pit provides not only a chamber to collect ashesfrom the grate 26 but it also serves as an air chamber, the purpose ofwhich is later described. Ashes may,

'from time to time, be discharged from the pit by 'opening the gate 28which is accessible from the lower floor level 29. Accessible from theinter- 'mediate floor level 30 are a number of circumferentially spacedfurnace doors 3! above and doors 32 below the grate for access to theinterier of the scription, termed a "Christmas tree" tuyre head. *This"Christmas tree tuyre head is designated generally by referencecharacter 36 and provides a tuyre through which air, preferably heated,is

forced into the pile 22 of rubbish to partially dry "it before it isfinally moved by the stoker outwardly onto the grate 26 for finalburning.

, ,The tuyre head 36 (see Fig. 2) comprises a plurality of truncatedhollow domes superimposed one above another in vertical alignment, thebottom truncated dome 31 being larger than a similar but smallertruncated dome 38 immediately above it. The dome 31 is preferably madeup of two complementary half sections bolted together. These two hollowtruncated domes 31 and 38 are capped by a hollow cap dome 39; The capdome 39 is closed at its top; whereas the domes below it in verticalalignment are open at bottom and top. The three dome members 31, 38 and39 are placed and held fixed one above v the other as shown clearly inFig. 2, so that there is an annular air port at the bottom periphery ofeach. Thus, at the bottom of cap dome 39 is an annular air port 40, atthe bottom of dome 38 is an annular air port 4l, and at the bottom ofdome 31 is an annular air port 42. And it may be noted here that theseair ports are under the lower peripheral edges of the domes each ofwhich 'protects its air port as by an overhanging eave so that the portscan not become plugged from 'the rubbish piled in the fire box on theChristmas tree tuyre head.

The "Christmas tree" head 36is mounted on a hollow center post 43 whichextends vertically through the central opening 44 of the annular Thiscenter post 43 is made in two sections: a lower section 43w and an uppersection 4327 secured together by a threaded connection 33. This centerpost 43 is secured to a spider having radially extending supporting legs45, the

'legs 'being welded, bolted or otherwise secured to channel irons 46 and23 and 24. It will be'obfurther in detail hereinafter.

4 served (see Figs. 1 and 2) channel irons 46 are short lengths andeXtend from channel 23 to channel 24 and are secured thereto at theirends. Channel iron 23 has a complementary channel iron 58, the edges oftheir flanges abutting one another and welded to form' air conduits 92and 92a. Channel iron 24 has a complementary channel iron 59, the edgesof their flanges abutting one another and welded to form an air conduit93, &sa which runsparallel to air conduit 92, 920,. The purpose of theseair conduits is explained The combined channels 23 and 58 and thecombined channels 24 and 59 extend entirely across the fire-box and aresupported in its walls. Together with channels 46 they form suitablesupporting frame members to support the weight of the stoker 35 and"Christmas tree" tuyre head 36. The lower end of the center post 43rests upon a pan 41 secured to the channelirons 46 and the conduitchannels 23 and 24. This pan serves to stabilize the lower end of thepost against sidewise movement and also serves as a bottom closureforthe stoker air chamber 93. I

The dome 31 is provided with a spider 48 se'- cured to a ring '49 whichfits over the post 43 and rests upon an annular shoulder 56 on the post43. In like fashion, dome 38 is provided with a spider '5l secured to aring 52 which rests'upon a shoulder 53 and'cap 39 is provided'with aspider 54 which rests upon the post; it being noted that the spider 54is cut awayat 55'to fit down into the hollow post 43b. Thesesuperimposed dome members are securely butremovably attached to the postin any suitable manner and' as shown bolts 56 are used. V x.

Mounted for rotation beneath the stationary "Christmas tree tuyre headis the stoker' 35. It comprises a hollow truncated dome member 60,having an inturned horizontally extending annular fiange 6! at the topand also an in- -wardly extending annular fiange`62 at the bottom.Depending from this annular flange and bolted thereto, as by bolts 63,is an outer sleeve 64. It extends through the central opening'44 of thehearth. This outer sleeve 64 -is secured to a concentric hollow shaft 65by means of a spider co-mprising fiat radial spokes' 66. The hollowshaft 65 is mounted for rotation on the center post 43 and turns on athrust bearing '61 resting upon an annular shoulder 68 secured to theDost. A tooth ring 69 is secured to the sleeve 64 to accommodate a'drive chain 16 for rotatably driving the sleeve and hence the stoker35. It may be noted here that the lower end of the sleeve rotates in anannular channel 11 provided with a suitable seal 12.

The rotatable hollow dome member 66 has 'secured thereto, as by studbolts 13, a plurality of circumferentially spaced,' generally radiallyextending and rearwardly curved hollow stoker arms 14. As shown thereare three such stoker arms. The interiors of these hollow stoker armscommunicate with the interior of the hollow rotatable dome member 60.These arms are substantially flat on the bottom 19 and have an inclinedleading face 15 and a trailing wall 16. The top of the leading face 15extends slightly to the rear of the top' of the trailingwall 16 toprovide an 'eave 11 to protect the stoker arm air'ports 18 sleeverotates power means to rotate said sleeve assembly and hence said stokerdomeand arms, means for supplying a stream of air to said grate andmeans including the passageway formed by said sleeves for supplying astream of air to said tuyre head and to said stoker dome and arms, saidtuyre head comprising a plurality of superimposed stationary e hollowtruncated conical domes and a capping dome, arranged in verticalalignment with a common axis and spaced apart to provide annular airports between adjacent domes, each dome being of smaller diameter at thebottom than the one below it.

3. An incinerator apparatus for burning rubbish which comprise afire-box, a fiue connected to said fire-box for the passage of hot gasesof combustion from burning the rubbish, a hearth in said fire-box havinga central opening, a grate at the periphery of said hearth, a hollowrotatable stoker dome having hollow arms extending outwardly andhorizontally over said hearth for stirring a pile of rubbish on saidhearth, a hollow sleeve assembly connected to said stoker dome, saidsleeve assembly comprising an outer sleeve depending from and rigidlysecured to said rotatable stoker dome and extending downwardly throughsaid central opening and an inner sleeve concentrically mounted in andsecured to said outer sleeve, said inner and outer sleeves providing anannular air passageway into said rotatable dome, a normally closedash-pit below said grate, a stationary tuyre head surmounting saidrotatable stoker dome, a stationary post within said inner sleevesupporting said tuyre head indeendently of said rotatable dome andproviding a bearing surface for said inner sleeve, power means to rotatesaid outer sleeve thereby to rotate said stoker dome, means including afirst conduit for supplying a stream of air to said grate and meansincluding a second conduit for supplying a stream of air to said annularpassageway and thence to said stationary tuyre head, means in said fiueconnected to said conduit for heating said air by utilizing the heat ofthe hot gases of combustion, adjustable bafile means in said first andsecond conduits by which the relative amounts of air passing to saidgrate and to said passageway may be regulated and bame means in saidpassageway by which the relative amounts of air passing to said hollowrotatable dome and to said tuyre head may be regulated, said tuyre headcomprising a plurality of superimposed hollow truncated domesprcgressively smaller in size from bottom to top,

said domes being arranged in "Christmas tree fashion so that there is anannular space between the periphery of the bottom of each dome and thesurface of the dome immediately below it.

4. A stoker and tuyre device for a rubbish burning furnace having ahearth with a central opening therein which comprises a hollow rotatabletruncated dome mounted to rotate about a Vertical shaft extendingthrough the hearth opening, hollow arms secured to and extendngoutwardly from said rotatable dome and arranged to rotate in ahorizontal plane over said hearth, a stationary tuyre head surmountingsaid rotatable dome, said tuyre head comprising a plurality of truncatedtuyre domes superimposed one above another, each of said tuyre domesbeing smaller than the one immediately below it, said domes beingvertically spaced to provide air ports between adjacent tuyre domes, arotatable sleeve assembly comprising an outer 'sleeve fixed to anddepending from said rotatable dome and an inner concentrically mountedsleeve fixed to said outer sleeve, said inner and outer sleevesextending through said opening and providing an annular passageway forair, a vertical stationary post mounted within said inner sleeveproviding a vertical shaft about which said sleeve assembly rotates,said post serving to carry the weight of said stationary tuyre head andserving as a bearing surface for said inner sleeve, a thrust bearingcarrying the weight of said rotatable dome and sleeves, means to rotatesaid sleeve assembly and hence said rotatable dome, and means to supplyair to said domes through said annular passageway and thence throughsaid ports.

5. A stoker and tuyre device for a rubbish burning furnace having ahearth with an opening therein, said stoker comprising a rotatablehollow truncated dome having an opening at its bottom and an opening atits top, hollow stirring arms adapted to sweep over the surface of saidhearth secured to said rotatable dome and extending outwardly therefromand having air ports in their walls, the interiors of said armscommunicatingwith the interier of said rotatable dome, a rotatablehollow sleeve assembly rigidly secured to and depending from saidrotatable dome and communicating with the opening in the bottom of saidrotatable dome, said sleeve assembly extending downwardly through theopening in the furnace hearth and comprising an outer sleeve fixed atits upper end to said rotatable dome and a concentric inner sleeveanchored to said outer sleeve, a stationary post extending upwardlythrough said inner sleeve and providing a vertical bearing surface forsaid inner sleeve, a plurality of stationary superimposed truncatedhollow domes carried by said post, each having an opening at its bottomand top 'and surmounting said rotatable stoker dome, and

a capping dome crowning said truncated domes,

said domes being vertically spaced to provide air ports at their bottomperipheral edges through which to pass air into rubbish piled on said 3hearth, a thrust bearing to carry the weight of said rotatable sleeveassembly and rotatable dome and means to rotate said sleeve assembly andhence the rotatable dome to which it is secured.,

6. A stoker and tuyre device for a rubbish burning furnace having ahearth with an opening therein, which comprises a rotatable dome havingan opening at its bottom and an opening at its top, hollow stirring armsadapted to sweep over the surface of said hearth secured to saidrotatable dome and extending outwardly therefrom* and having air portsin their walls, the interiors of said arms communicatirg with theinterior of said rotatable dome, a rotatable stoker supporting assemblysecured to and depending from said rotatable dome and extendingdownwardly through the opening in the furnace hearth,` said assemblycomprising an outer hollow sleeve and a concentrically mounted innersleeve anchored to said outer sleeve, the annular space between saidsleeves providing a passageway for a current of air to said rotatabledome, means to rotate said supporting assembly and hence said rotatabledome, a stationary tuyre head supporting post extending upwardly throughthe center of said opening, and a tuyre head carried on said post, ,saidtuyre head comprising superimposed truncated hollow domes, each havingan opening at its bottom and top and surmounting said rotatable dome.and a,

capping dome closed at its top crowning said truncated domes, said domesbeing verticaly spaced to provide air ports at their peripherai edgesthrough which to pass air into rubbish piled on said hearth, saidstationary post providing a hearing surface about which said innersleeve rotates and serving to carry the weight of said tuyre headindependently of said rotatable stoker dome, and a thrust hearing onwhich said stoker supporting assembly rotates and serving to carry theweight of said rotatable dome and arms.

7. A stoker and tuyre device for a rubbish burning iurnace having ahearth with an opening therein, said stoker comprising a rotatablehollow trunoated dome having an opening at its bottom and an opening atits top, hollow stirring arms adapted to sweep over the surface of saidhearth secured to said rotatable dome and extending outwardly therefromand having air ports in their walls, the interiors of said armscommunicating with the interior of said rotatable dome, a hollow sleeveassembly having an outer sleeve secured at its upper end to anddepending from said rotatable dome and having a concentric inner sleevesecured to said outer sleeve by webs, the annular space between saidsleeves providing an air passageway, said passageway of the sleeveassembly communicating with the opening in the bottom of said rotatabledome, said sleeve assembly extending downwardly through the opening inthe furnace hearth, a stationary post extending upwardly through thecenter of said inner sleeve and providing a vertical hearing surface onwhich said inner sleeve rotates a piuraiity of stationary superimposedtruncated hollow domes above said rotatable dome and communicating withsaid passageway and carried by said post, each having an opening at itsbottom and top and surmounting said rotatable dome, and a stationarycapping dome closed at its top crowning said stationary truncated domes,said stationary domes being vertically spaced to provide air ports attheir peripheral edges through which to pass air into rubbish piled onsaid hearth, a thrust hearing on which said sleeve assembly rotates andcarrying the weight of said rotatable dome, arms and sleeve assembly,and means to rotate said sleeve thereby to rotate said rotatable domeand arms.

8. A stoker and tuyre device for a rubbish 10 burning furnace having ahearth with an ope ing therein, said stoker comprising a rotatableholiow truncated dome having an opening at its bottom and an opening atits top, hoilow stirring arms adapted to sweep over the surface of saidhearth secured to said rotatable dome and extending outwardly therefromand having air ports in their walls, the interiors of said armscommunicating with the interier of said rotatable dome, an outer hollowsleeve secured to and depending from said rotatable dome andcommunicating with the opening in the bottom of said rotatable dome,said outer sleeve being adapted to extend downwardiy through the openingin the furnace hearth, an inner hollow sleeve concentrically mounted inand secured to said outer sleeve, a post extending upwardly through saidinner sleeve and providing a hearing surface for said inner sleeve, aplurality of superimposed trunoated hoilow domes carried by said post instationary position and forming a stationary tuyre head, each having anopening at its bottom and top and surmounting said rotatable stokerdome, a capping dome crowning said truncated domes, said domes beingverticaily spaced to provide air ports at their bottom peripherai edgesthrough which to pass air into rubbish piied on said hearth, anda'baflie extending downwardly from said tuyre head into said rotatabledome and terminating i'n said hollow outer sleeve and serving to directair passing through said sleeve in relative amounts to said hollowrotatable dome and to said stationary tuyre head.

WARREN S. MARTIN.

CHARLES HENNIG.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATIEINTS`

